Miniature magnetic tape dictating machine



Feb.-19, .1963 w. H. LYON ETAL 3,078,350

*MINIATUREMAGNETIC TAPE DICTATING MACHINE Filed on. 27, 1958 v Sheets-Sheet Fig.1 a

4 2 L J 27 A? 26 x2 INVENTQR5 WILL/HM H- LYON 48 w R A? BY FRFi/vK E, Ru/vq HTTORNEY Feb. 19, 1963 Filed 001;. 27, 1958 w. H. LYON ETAL MINIATURE MAGNETIC TAPE DICTATING MACHINE 'r Sheets-Sheet 2 FRHNK E RUNGE HTTORNEY Feb. 19., 1963 w. H. LYON ETAL MINIATURE MAGNETIC TAPE DICTATING MACHINE Filed Oct. 27, 1958 INVENTORS WILL/HM H- LYON BY F'RHNK E RUNGE HTTORNEY Feb. 19, 1963 -w.- H. LYON ET-AL I MINIATURE MAGNETIC TAPE DICTATING MACHINE Filed Oct. 27. 1958 7 Sheets-Sheet 6 WILL/HM H. LYON BY FRHNK E, Ru/vqE HTTOR NEY Feb. 19, 1963 w. H. LYON- EQITAL MINIATURE. MAGNETIC 'I'KPE DICTATING- MACHINE Filed Oct. 2'7, 1958 INVENTORS WILL/HM H. LYON BY FRHNK E. RUNGE HTTORNEY United States Patent 3,078,359 MINIATURE MAGNET1 TAPE DECTATING MAtIi-HNE William H. Lyon, Orange, and Frank E. Range, Branford, Qonnn, assignors to The Soundscriber Corporation, New Haven, Conn, a corporation of Connecticut Filed on. 27, was, Ser. No. 769324 4. Claims. or. ire-1on2 This invention relates to dictating machines and is directed particularly to a self-contained miniature dictating mas The principal object of the invention is to provide an improved dictating machine of the above nature which will be small enough to be held in the palm of the hand and adapted to be readily controlled for standby recording, indexing, logging, rewinding, and playback by the fingers of the same hand.

Another object of the invention is to provide a selfcontained miniature dictating machine of the character described which records on magnetic tape spooled in a self-contained magazine unit that can readily be removed for storage or sound erasing and replaced by a fresh magazine.

Another object is to provide a recording tape magazine for said dictating machine having finger-actuated means for producing logging indications on an elapsed time scale so that any particular portion of the recording can be easily located and identified during playback.

Still another object is to provide a battery-operated miniature dictating machine of the character described, wherein the recording tape magazine contains at least fifteen minutes of recording time, and wherein upwards of twenty hours of satisfactory operation can be had without replacement of the battery.

A further object is to provide a miniature dictating machine of the above nature which will be simple in construction, foolproof in operation, inexpensive to manufacture, easy to manipulate, ornamental in appearance, dependable in operation and very efiicient and durable in use.

Other objects, features and advantages of the invention will be apparent from the following description when read with reference to the accompanying drawings. In the drawings, wherein like reference numerals denote corresponding parts throughout the several views,

FIG. 1 is a front elevational view of a miniature hand dictating machine embodying the invention.

FIG. 2 is a left-hand side elevational view thereof.

FIG. 3 is a right-hand side elevational view thereof, shown with the tape magazine removed.

FIG. 4 is a front elevational view of the tape magazine shown separately, the storage cover being illustrated in cross-section.

FIG. 5 is a left-hand side elevational view of the magazine shown in FIG. 4.

FIG. 6 is a horizontal cross-sectional view taken along the line 66 of FIG. 4 looking in the direction of the arrows. A

FIG. 7 is a vertical cross-sectional view, of the dictating machine taken along the line 77 of FIG. 2, and on an enlarged scale showing details of the operating mechanism.

FIG. 8 is a vertical cross-sectional view taken along the broken line 8--8 of FIG. 7 looking in the direction of the arrows.

"FIG. 9 is a horizontal cross-sectional view on an en larged scale, taken along the line 91 of FiGS. 1, 7 and 8 looking in the direction of the arrows.

FIG. 10 is a horizontal cross-sectional enlarged view taken alongthe, line llfi1tl of FIGS. 1, 7 and 8, looking in thedirection of the, arrows.

Patented Feb. 19, 15963 FIG. 11 is a horizontal cross-sectional enlarged view, taken along the line 1,1--11 of FIGS. 1, 7 and 8 looking in the direction of the arrows.

FIG. 12 is a horizontal cross-sectional view, taken along the line 1212 of FIG. 7 in the direction of the arrows.

FIG. 13 is a partial vertical cross-sectional view of the dictating machine, similar to FIG. 7, but showing the mechanism actuated for listening or playback.

FIG. 14 is a view similar to a portion of FIG. 13, showing the mechanism actuated for rewinding.

FIG. 15 is a view similar to FIG. 14, showing the mechanism actuated for recording.

FIGS. 16 and 17 are side elevational views showing details of the tape drive clutch roller mechanism in unactuated and actuated condition for playback, respectively.

FIG. 18 is a horizontal cross-sectional view taken along the line 1818 of FIG. 15.

FIG. 19 is a front elevational view of the drive motor with the cover in assembled, position.

FIG. 20 is a view of the'drive motor shown in FIG. 19, with the cover removed.

FIG. 21 is a vertical cross-sectional view taken along the broken line 212-1 of FIGS. 19 and 20 looking in the direction of the arrows.

FIG. 22 is a vertical cross-sectional view, taken along the line 22-22 of FIG. 19 in the direction of the arrows, and

FIG. 23 is a vertical cross-sectional view, on an enlarged scale, of the tape magazine, taken along the line 23-23 of FIG. 4, in the direction of the arrows.

As. best illustrated in FIGS. 1, 2 and 3, the hand miniature dictating machine 10 embodying the invention is enclosed in a two-part longitudinally-divided case, preferably molded of synthetic plastic material, having a back half 11 and a front half 12, the latter being foreshortened at its lower end to leave space for a replaceable tape magazine 13.

As can be seen in FIG. 1, the case halves 11 and 12 are held together by four screws 14. Mounted in the upper end of the case, and supported between the two halves 11 and 12, is a microphone 15 (see FIG. 7) which also serves as a loudspeaker during playback or listening,

The case also houses, in the bottom portion of the back half 11, a battery of four series-connected cells 16 (see FIGS. 8, 11) supported between spring clip connectors 17. Power from the cells 16 serves to energize a flat slow speed tape drive motor 18 (FIGS. 19-22) and a transistor amplifier 191 (FIG. 9), housed within the case halves 11 and 12 As illustrated in FIGS. 2, 7, 9 and 10, the case halves 16 and 11 are provided with recesses 28 and 21, at the left and right hand sides respectively, near the upper end. A control lever 22, arranged in the recess 20, is pivoted at its upper end about a pin 23 and is movable through an opening in the case.

It will be apparent that the equipment is designed to fit in the hand in such a way that when it is picked up, the index finger will be in position for actuating the-lever 22. Actuation of the lever 22 operates a switch 24, secured to the inside of the case half 11, through a leaf spring 215, which normally holds the lever 22 in its outermost position. Not illustrated, circuitry connected with the switch 24 applies. power to the tape drive motor 18 and, at the same time, completes the energization circuit to the transistor amplifier 19 and power amplifier 19a. The equipment is thus put into stand-by condition ready to carry out the wishes of the operator. I

As is hereinbelow. more fully described, a select r but.- ton 26 (FIGS, 3' and 7) extends througha slot 27in the recess 21 at the right-hand side of the case in position for aoraaao control by the users thumb for up and down movement into listen, record and rewind stand-by positions, after which inward pressure upon said button will carry out the selected functions.

The replaceable tape magazine 13 will now be described, with reference to FIGS. 4, 5, 6, 7, 8, 11, 13, 14 and 23. The tape magazine 13 is housed in a box-like structure 28 of synthetic plastic material which is open at its upper end, and has a rectangular back member 29 and a transparent front cover member 38 secured to said back cover member upon assembly as by cement. As illustrated in FIGS. 4, and 23, a dust cover 31 is provided for protection of the open end of the magazine when removed from the remainder of the dictating equipment.

The tape magazine 13 includes a tape take-up reel hub 32, having a flange 33, and a tape feed reel hub 34 having a flange 35, said reels being separated by a disc 36 and rotatably mounted on a common pin 37 fixed to a back plate 38 (FIG. 23). The back plate 38 is secured against the back member 29 of the magazine box structure by means of screws 39 entering tapped bosses 40 (FIGS. 7 and 8) provided in said back plate 38. The reels of magnetic tape T are held in place by a front plate 41 (FIG. 23) which is secured in place by screws 42 engaged into four tapped spacer posts 43 (FIG. 7) secured against the back plate 38.

The tape T passes fro-m the tape feed reel hub 34 around a roller 44 journalled at one end of a bracket 45 secured by clamping to the back plate 38 under the lower lefthand spacer post 43 as illustrated in FIGS. 7 and 11.

The tape T then moves up level with the plane of the take-up reel hub 32, where it passes over a roller 46 journalled at the other end of the bracket 45. The tape T then passes upwardly along the side of the magazine, as

illustrated in FIG. 7, and moves over a first roller 47 journalled on a pin 48 fixed to the back plate 38 and then over a second roller 49 laterally spaced therefrom by a short distance and journalled on a pin 50 also fixed to the back plate 38.

The upper surface of the tape T where it passes between the first and second rollers 47 and .9 is adapted to contact a magnetic transducer head 51 secured within the back half 11 of the equipment case as by screws 52 (FIG. 13). The tape is held in close contact with the pole piece of the transducer head 51 by means of a pressure pad 53 acting from underneath the tape and resiliently urged upwardly by a coiled compression spring 54.

From the second roller 49 the tape T winds upon the take-up reel hub 32, the flange 33 of which is driven from the capstan 56 of the motor 18 through a forward drive roller 57 in the manner hereinbelow fully described.

Indexing Mechanism Means is provided for indexing the material recorded on each magazine tape, the same comprising a detachable index card 58 having a tab 59 provided centrally at the upper end thereof (see FIG. 4). The index card 58 is held in place by openings in said card placed over rivets 60 provided in the front plate 41 and can readily be removed for replacement by pulling upward on the tab 59. The index card 58 is provided with a calibration scale 61 having lines representing minutes. The tape magazine is provided with a pointer 62 which indicates in time the amount of tape T that has been wound upon the takeup reel hub 32.

The pointer 62 is driven by a roller 63 (FIG. 7) which is mounted at one end of an arm 64, journalled on a pin 65. The other end of the arm 64 is fixed to a pin 55 by means of which it rotates the pointer 62 which is also secured to said pin. The pin 55 is rotatably journalled between bearings 67 and 68 (FIG. 23) provided in the back plate 38 and the front plate 41, respectively. A torsion spring 69 surrounding the pin 55 has its ends secured between the back plate 38 and the arm 64 so as to urge said arm and its roller 63 against the tape T as it piles up on the take-up reel hub 32. A thrust washer 66 is provided between the arm 64 and the bearing 68.

Logging Logging is accomplished by pressing the pointer 62 downward toward the log scale 61 in such a way that the curved tip 62a thereof scratches the surface of the index card 58. The scratch so made on the card 58 is visible through the transparent front cover member 30 and can be used during playback to locate recorded points on the tape T. The pointer 62 may be depressed for this purpose by pushing inwardly a horizontal rectangular button 76 extending through an opening in the front cover member 38 of the magazine case. The button 70 is held in place by integral bars 71, secured thereto and which are pressed by a pair of curved vertical leaf springs 72. The leaf springs 72 are secured at their upper ends by the screws 42 which hold the front plate 41 in place, and are guided at their lower ends by rivets 72a provided in the front plate 41 (see FIG. 8).

Drive Motor Considering now the detailed construction of the drive motor 18, and referring to FIGS. 19, 20, 21 and 22, it will be seen that said motor is comprised of a rear cast ing 73 and a front casting 74 secured together by a pair of screws 75. The front casting 74 is provided with two spaced bearings 76, 77 aligned with each other and with a bearing 78 in the base casting 73.

The motor capstan 56 is journalled in the bearings 76, 77 and 78 and carries a rotor 79 located between the bearings 77 and 78, aligned With each other.

The rotor 7 8 is formed with a plurality of equally spaced peripheral magnetized poles 80 which operate the motor at a slow uniform speed suitable for directly driving the magnetic tape T in the magazine 13.

The rotor 75 is electrically driven by a pair of electro magnetic coils 81, 82 which are energized from a twophase A.C. source of current generated in the amplifier 19. The coils 81, 82 are securely mounted on the base casting 73 by headed screws 83. The magnetic flux from the coils 81, 82 is transmitted to the rotor 79 by two pairs of pole pieces 84, 85 respectively.

As shown in FIGS. 8 and 10, the back half 11 of the machine case is formed with a plurality of bosses 86 against which the drive motor 18 is secured by flat-head screws 87.

Tape Actuating Mechanism Considering now the actuating mechanism interconnecting the drive motor 18 with the take-up reel and feed reel flanges 33 and 35, and referring first to FIG. 7, it will be seen that the forward drive roller 57 is rotatably mounted at one end of an arm 88 pivoted about a pin 89. As illustrated in FIGS. 16-18), the other end of the arm 88 is secured to a collar 90 which is pivoted on a stud pin 91, firmly secured to and extending outwardly from the top of the motor casting 74. The arm 88 is held in place on the pin 91 (FIG. 14) by means of a lock nut 92.

A coiled tension spring 93 (FIG. 7) is arranged between the arm 88 and a stud 93a provided on the motor top casting 74 to exert pressure on the drive roller 57 in the direction of the motor drive capstan 56 and the takeup reel flange 33. A slot 94 in the arm 88 and its collar 94) (see FIG. 13) permits accurate adjustment of the loca tion of the roller 57 between the capstan 56 and the flange 33 when it is driving the tape T forward.

Rewinding In order to re-wind the tape T on the feed reel hub 34, a re-wind roller 95 (FIGS. 13, 14 and 15) is arranged to be moved into engagement with the flange 35 of said feed reel hub. The re-wind roller is journalled at one end of an arm 97 similar to the arm 88. The other end of the arm 97 is fitted with a collar 96 (FIG. 18)

which is pivoted on the stud pin 91 behind the collar 90 of the arm 88.

, The collar 96 is provided with an elongated slot (not illustrated) similar to the slot 94 in the collar 90, to permit accurate positioning of the roller 95 between the capstan 56 and the feed reel hub flange 35 when driving the feed reel hub 34 in reverse. A coiled spring 98 (FIG, 16) similarly applies pressure to the re-wind roller 95 when it is in operation, said roller 95 being rotatably mounted on the pin 89.

The drive roller 57 and the rewind roller 95 are held in neutral positions normally by projections 99 and 100 forming part of the arms 88 and 97, respectively (see FIGS. 13, 14 and 15). The projections 99 and 100 rest on pins 101, 102, which are fixed to and extend outwardly from each side of a pair of drive actuators 103,

104, respectively (see FIGS. l3, l4, l5 and 18). The drive actuators 103, 104 are provided with fixed collars 105, 106, respectively, which are pivotally journalled on a common stud pin 107 secured to the top casting 74 of the motor 18, said actuators being held in place on said stud pin between a pair of lock nuts 109. A spring washer 108 is also provided on said pin 107 between the actuators 103, 104, Coiled torsion springs 1 10, 111 (FIG. surrounding the collars 105, 106 and acting between an abutment pin 112 (FIGS. l3, 14, and 18) secured to the top casting 74 of the motor and the underside of the pins 101, 102, respectively, press said pins 101 d 0 upw rd y with sufiieient p ess to overcome th sion afi r ed by the tension. springs. 92. 98 acting po h e pec ive. arms 88. and 97,. a d hol said a n a neu ral p s tion- Wh he drive actuator 103 is ated counterclockwise. about the stud pin 107, the pin 101 will be moved with relation to. the projection 99 of the arm 88, and the drive. roller 57 will be permitted to drop into contact with the capstan 56 and the flange 33 of the take- P el hub 32,, under the urging of the tension spring 93, whereupon the tape T will be driven in the forward direction.

When the drive actuator 104 is moved with relation to the projection 100 of the arm 97, the drive roller 95 is permitted to drop into contact with the capstan 56 and the flange 35 of the feed reel hub 34, whereupon the tape T will be driven in the reverse direction.

As hereinabove mentioned, pivotal movement of the selector button 26 (FIGS. 3, 7, 13 and 14) permits selection of listen, record and re-wind by moving it into one of its three positions. Subsequent pressure on the button 26 causes any one of the three selected functions to operate. To this end, the button 26 is firmly attached to a lever 113 (see FIGS. 7, 9 and 12) formed with a pair of spaced parallel elongated members 114, 115, which extend between a pair of parallel detent plates 1 16, 117 secured against the inside of the back half 11 of the equipment case by screws 118. Secured between the inner detent plate 117 and the back half 11 of the casing are a pair of upper and lower microswitches 119,

120, respectively (-FIGS. 7 and 8).

The spaced elongated members 114, 115 of the lever 113 are loosely attached to the detent plates 116, 117 by transverse pins 121, 122 (FIG. 12). The pin 122 is fixed to the elongated members 114, 115 and has its ends fitted with rollers 124 which ride in slots 123 in the respective detent plates 116, 117.

The pin 121 is freely attached to the elongated members 114, 115, operating in slots 125 therein and has rollers 130 at its outer ends which ride over the front edges of the respective detent plates 116, 117. A coiled tension spring 126 arranged between the spaced members 114, 115 of the lever 113 interconnects the pins 121, 122 and serves to urge the pin '122 inwardly so that its rollers 130 bear resiliently against the front edges of the detent plates 116, 117.

Upon manual pivotal movement of the button 26, the

Tape Movement When the control lever 113 is in the record position, a transverse pin 131 (FIG. 12) fixed near the end of said lever will be constrained within an open slot 132 (FIGS. 13, 14, 15.) forming part of a projection 133 of the drive actuator 103. Thereafter, when the lever 113 is pushed in by the button 26, the pin 131 will rotate the drive actuator 103 counterclockwise, causing the tape T to move in the forward direction by engaging the motor drive mechanism with the magazine take-up reel flange 33, as hereinabove explained.

It will be understood that when the control lever 113 is in the listen position, corresponding to engagement in the control detents 128 in the detent plates 116, 1 17 (see FIG. 13), the pin 131 will still be constrained in the slot 132 of the drive actuator 103, whereupon when the button 26 is pressed, the tape T in a like manner will be caused to be moved in the forward direction.

Moreover, when the control lever 113 is in the rewind position, corresponding to engagement in detents 129 in the detent plates 116, 117 (see FIG. 14), the pin 131 will be out of the slot 132 of the drive actuator 103, and in a slot 134 of the drive actuator 104. Consequently, when the button 26 is depressed, the pin 131 will cause counterclockwise rotation of the drive actuator 104 and consequent clockwise rotation of the arm 97, permitting the rewind roller to contact the flange 35 of the feed reel hub 34, driving it backwards and thus rewinding the tape T.

When the lever 26 is in the record position, the pin 121 will actuate the microswitch 119 through a leaf spring 135 associated therewith (see FIGS. 7 and 8), and at the same time open the microswitch through the leaf spring 136 associated therewith. The microswitches 119 and 120 are connected in circuit with the amplifier for recording.

When the lever 26 is in the listen and re-wind positions, the microswitch 120 will be closed and the microswitch 119 will be open, whereby the amplifier is placed into playback condition. The circuits for performing these operations, being conventional, are not illustrated or described in detail herein.

While there has been described and illustrated in this specification one form in which the invention may conveniently be embodied in practice, it is to be understood that this form is presented by way of example only and that the invention is not limited to the specific disclosure but may be modified and embodied in various other equivalent forms. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent is:

1. A miniature hand dictating machine comprising a casing adapted to be held in the palm of the users hand, a tape magazine removably attached to said casing and having a feed reel and a take-up reel between which the tape runs, a drive motor having an elongated capstan extending into the interior of said casing, means in said casing for energizing said motor, a transducer head in said casing arranged to scan the tape running from one of said reels to the other, mechanism including said motor for rotating one of said reels to reversibly move said tape, said mechanism comprising a pair of arms pivotable at one end about a fixed common stud pin and carrying each a roller journalled at the other end, said feed reel and said take-up reel having circular flanges of equal size and being mounted for rotation about a shaft parallel to said stud pin, one of said arms being movable so that its roller is in contact with said capstan and the flange of said take-up reel, the other of said arms being movable so that its roller is in contact with said capstan and the flange of said feed reel, and finger controlled actuating means for selectively moving one or the other of said arms so that its roller is in contacting position, said actuating means comprising a pivoted lever swingable to record, listen and re-wind positions selectively, said lever being depressible in each position for actuating said rotating mechanism for rotating said take-up reel when said lever is depressed while in either of said recor and listen positions, and for rotating said feed reel when said lever is depressed while in said re-wind position, said actuating means further including a pair of detent plates fixed in spaced parallel relation within said casing, said lever extending between said detent plates and having a first transverse pin extending transversely through and fixed to a rear portion thereof, said first transverse pin extending through and being slidable in longitudinal slots in the rear of said detent plates, the front edges of said plates each being arcuate in form and having three arcuately spaced detents, a second transverse pin extending loosely through slots in said lever and provided with rollers at its end, a tension spring interconnecting said first and second transverse pins for urging the rollers on said second pin against the front edges of said detent plates, said lastnamed rollers being adapted to fit into the detents of said detent plates selectively at three positions as said lever is pivoted about said transverse first pin, a third transverse pin fixed to and extending transversely from said lever, a pair of drive actuators rotatable about a common fixed pin and having spring means normally urging said actuators in one direction, said drive actuators each having abutment means for holding one each of said arms in its neutral position, said third transverse pin'being movable arcuately in a slot portion of one of said drive actuators when said lever is in two adjacent of said detent positions and being movable in a slot portion of the other of said drive actuators when said lever is in the remaining one of said detent positions, said arms each having spring means urging them in the contacting positions of their 8 rollers, whereupon when said lever is pushed in while in either one of said two detent positions, said take-up reel will be rotated for moving the tape forward, and when said lever is pushed in while in the remaining one of said detent positions said feed reel will be rotated for rewinding the tape. 1

2. The invention as defined in claim 1, wherein the common pin about which said actuators are rota-table is parallel to the stud pin of said arms, said abutment means comprising a pin on each of said actuators engageable each with a projection on each of said arms.

3. The miniature hand ditcating machine as defined in claim 2, including an amplifier and a combination loudspeaker-microphone in said case, and switch means controlled by said lever for connecting said speaker-microphone, amplifier and transducer head for recording through said speaker-microphone when said lever is depressed while in said record position, and for connecting said speaker-microphone amplifier and transducer head for playback through said speaker when said lever is depressed while in said listen position.

4. The invention as defined in claim 2, wherein said recording tape magazine is provided with means for in dicating the amount of tape remaining on the feed reel.

References Cited in the file of this patent UNITED STATES PATENTS 2,584,733 Owens Feb. 5, 1952 2,668,021 Gleason Feb. 2, 1954 2,681,950 Owens June 22, 1954 2,712,448 Schroter July 5, 1955 2,726,288 Ellis Dec. 6, 1955 2,733,069 Frost et a1 Jan. 31, 1956 2,741,439 Dale et al Apr. 10, 1956 2,866,010 Dale Dec. 23, 1958 2,893,737 Travis July 7, 1959 2,894,700 Roberts July 14, 1959 2,909,617 Shields Oct. 20, 1959 3,008,012 Proctor Nov. 7, 1961 

1. A MINIATURE HAND DICTATING MACHINE COMPRISING A CASING ADAPTED TO BE HELD IN THE PALM OF THE USER''S HAND, A TAPE MAGAZINE REMOVABLY ATTACHED TO SAID CASING AND HAVING A FEED REEL AND A TAKE-UP REEL BETWEEN WHICH THE TAPE RUNS, A DRIVE MOTOR HAVING AN ELONGATED CAPSTAN EXTENDING INTO THE INTERIOR OF SAID CASING, MEANS IN SAID CASING FOR ENERGIZING SAID MOTOR, A TRANSDUCER HEAD IN SAID CASING ARRANGED TO SCAN THE TAPE RUNNING FROM ONE OF SAID REELS TO THE OTHER, MECHANISM INCLUDING SAID MOTOR FOR ROTATING ONE OF SAID REELS TO REVERSIBLY MOVE SAID TAPE, SAID MECHANISM COMPRISING A PAIR OF ARMS PIVOTABLE AT ONE END ABOUT A FIXED COMMON STUD PIN AND CARRYING EACH A ROLLER JOURNALLED AT THE OTHER END, SAID FEED REEL AND SAID TAKE-UP REEL HAVING CIRCULAR FLANGES OF EQUAL SIZE AND BEING MOUNTED FOR ROTATION ABOUT A SHAFT PARALLEL TO SAID STUD PIN, ONE OF SAID ARMS BEING MOVABLE SO THAT ITS ROLLER IS IN CONTACT WITH SAID CAPSTAN AND THE FLANGE OF SAID TAKE-UP REEL, THE OTHER OF SAID ARMS BEING MOVABLE SO THAT ITS ROLLER IS IN CONTACT WITH SAID CAPSTAN AND THE FLANGE OF SAID FEED REEL, AND FINGER CONTROLLED ACTUATING MEANS FOR SELECTIVELY MOVING ONE OR THE OTHER OF SAID ARMS SO THAT ITS ROLLER IS IN CONTACTING POSITION, SAID ACTUATING MEANS COMPRISING A PIVOTED LEVER SWINGABLE TO "RECORD," "LISTEN" AND "RE-WIND" POSITIONS SELECTIVELY, SAID LEVER BEING DEPRESSIBLE IN EACH POSITION FOR ACTUATING SAID ROTATING MECHANISM FOR ROTATING SAID TAKE-UP REEL WHEN SAID LEVER IS DEPRESSED WHILE IN EITHER OF SAID "RECORD" AND "LISTEN" POSITIONS, AND FOR ROTATING SAID FEED REEL WHEN SAID LEVER IS DEPRESSED WHILE IN SAID "RE-WIND" POSITION, SAID ACTUATING MEANS FURTHER INCLUDING A PAIR OF DETENT PLATES FIXED IN SPACED PARALLEL RELATION WITHIN SAID CASING, SAID LEVER EXTENDING BETWEEN SAID DETENT PLATES AND HAVING A FIRST TRANSVERSE PIN EXTENDING TRANSVERSELY THROUGH AND FIXED TO A REAR PORTION THEREOF, SAID FIRST TRANSVERSE PIN EXTENDING THROUGH AND BEING SLIDABLE IN LONGITUDINAL SLOTS IN THE REAR OF SAID DETENT PLATES, THE FRONT EDGES OF SAID PLATES EACH BEING ARCUATE IN FORM AND HAVING THREE ARCUATELY SPACED DETENTS, A SECOND TRANSVERSE PIN EXTENDING LOOSELY THROUGH SLOTS IN SAID LEVER AND PROVIDED WITH ROLLERS AT ITS END, A TENSION SPRING INTERCONNECTING SAID FIRST AND SECOND TRANSVERSE PINS FOR URGING THE ROLLERS ON SAID SECOND PIN AGAINST THE FRONT EDGES OF SAID DETENT PLATES, SAID LASTNAMED ROLLERS BEING ADAPTED TO FIT INTO THE DETENTS OF SAID 